[Matplotlib-users] bug for savefig to eps in the latest version of matplotlib

[Benjamin Root]

I was thinking it was possibly a change in background, but that would have
been tied to the style change. Since the bug is in both syles, my original
theory doesn't pan out.

Ben Root

On Sat, Apr 1, 2017 at 4:00 PM, Thomas Caswell <tcaswell at gmail.com> wrote:

> The black is probably from a 0 alpha ending up in the output (which eps
> does not support).  I wonder where you think the bug is Ben, my guess is in
> the image resampling code.
>
> Tom
>
> On Thu, Mar 30, 2017 at 10:01 AM Xu, Bin <xubinrun at gmail.com> wrote:
>
>> Dear Ben Root,
>>
>> Thanks for your suggestions. Here, I used "plt.style.use('classic')", but
>> the created eps figure was still  similar to previous one or even larger...
>> Incidentally, the matplotlibrc I used is the default matplotlibc in my
>> version 2.0.0.
>> Bin
>>
>>
>> On 03/30/2017 09:43 PM, Benjamin Root wrote:
>>
>> as a test, can you activate the "classic" mode? I have a suspicion what
>> this bug is. Just add "import matplotlib; matplotlib.use('classic')" before
>> any plotting calls.
>>
>> Ben Root
>>
>>
>> On Wed, Mar 29, 2017 at 11:16 PM, Xu, Bin <xubinrun at gmail.com> wrote:
>>
>> Dear all,
>>
>> I recently update my matplotlib to the latest version, and found
>> pyplot.savefig to eps file didn't work well like previous version.
>> Test script:
>> ==================================
>> #!/usr/bin/python -tt
>> from matplotlib.colors import LogNorm
>> import matplotlib.pyplot as plt
>> import numpy as np
>>
>> # normal distribution center at x=0 and y=5
>> x = np.random.randn(100000)
>> y = np.random.randn(100000) + 5
>>
>> plt.hist2d(x, y, bins=40, norm=LogNorm())
>> plt.colorbar()
>> #plt.show()
>> plt.savefig('test.eps')
>> #plt.savefig('test.png')
>> ==================================
>> The result of plt.show() is just like the result of test.png, while
>> test.eps has a weired large file size (more than 20 MB in other case). In
>> the meantime, the facecolor for 'NaN' value in test.eps is black, different
>> from test.png and previous version. I consider it is a bug here.
>> How to reach the desired style (regular size, and white color for 'NaN'
>> value in image)?  Thanks a lot.
>> --
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Xu,Bin
>>
>>
>>
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>>
>>
>>
>> --
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Xu,Bin
>>
>> School of Materials Science and Engineering,
>> Shanghai Jiao Tong University,
>> 800 Dongchuan Road, Minhang,
>> Shanghai 200240, China
>>
>> Email: xubinrun at gmail.com, xubin_materials at sjtu.edu.cn
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
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